Power-hammer.



E. NYSTROM.

POWER. HAMMER.

APPLICATION FILED JULY 7, 1913.

1,128,490. Patented Feb. 16, 1915.

6 SHEETSSHEET l.

"HE NORRIS PETERS c0. PHOTO-LITHQ, WASHING mm D C.

E. NYSTROM.

POWER HAMMER.

APPLICATION FILED JULY 7, 1913. 1,128,490.

G SHEETSSHEET 2.

Patented Feb. 16, 1915.

E. NYSTROM. POWER HAMMER.

APPLICATION FILE D JULY 7 1913.

HE NORRIS PETERS C0.. PHDTOVLITHOH WASHING roN. D. c.

Patented Feb. 16, 1915.

6 SHEETS-SHEET 3.

E. NYSTROM.

POWER HAMMER.

APPLICATION FILED JULY 7,1913,

1,128,490. Patented F6016, 1915.

6 SHEETS-SHEET 4 THE NORRIS PETERS Cll. PHOTCJJTHQ, WASHINGTON. n. c.

E. NYSTROM.

POWER HAMMER.

APPLICATION FILED JULY 7, 1912.

Patented Feb. 16, 1915.

LEQEAQG.

6 SHEET$SHEET 6.

NORRIS PETERS 50.. F'HOTO-LITHOI, WASHING TON. D. c.

E. NYSTROM. POWER HAMMER.

APPLIGATION FILED JULY 7, 1913.

1,128,490. Patented Feb. 16, 1915' 6 SHEETS-SHEET 6 ,THE NORRIS PETERS CO" PHOTO-LITHQ. WASHINGTON, D. C.

ERNST NYSTROM, OF ROCKFORD, ILLINOIS.

POWER-HAMMER.

Specification of Letters Patent.

Patented Feb. 16, 1915.

Application filed July 7, 1913. Serial No. 777,693.

T all whom it may concern:

Be it known that I, ERNST NYs'rRoM, a citizen of the United States, residing at Rockford, in the county of Winnebago and State of Illinois, have invented certain new and useful Improvements in Power-Hammers, of which the following is a specification.

This invention relates to improvements in power hammers and its object is to produce such a hammer mounted upon a turn table which is secured upon a track or runway over which it may be made to travel. Means for lengthening or shortening the stroke of the hammer are also provided.

With the foregoing and other objects in view the invention consists in the combination and arrangement of parts to be hereinafter fully described in the following specification, pointed out in the claims and illustrated in the accompanying drawings which form a part of said specification and in which Figure 1 is a side elevation of my improved power hammer. Fig. 2 is a plan of the same. Fig 3 is section taken on line 3-3 of Fig. Fig. at is a detail showing how the hammer is connected to the driving mechanism. Fig. 5 is a view similar to Fig. 1 with the parts in an altered position. Fig. 6 is a detail of the turn table actuating mechanism. Fig. 7 is a plan showing changed position. Fig. 8 is a detail view in section, similar to Fig. 6. Fig. 9 is a detail. Fig. 10 is a detail of the hammer mechanism. Fig. 11 is a similar View in changed position.

Like reference characters indicate corresponding parts throughout the several views.

.The reference numeral 1 designates the platform or base upon which my device is disposed and said platform is formed with a track or runway 2 and also with bearings 3, 3 for a transverse rotary shaft 1, one end 5 of which is square in cross section and which shaft is provided with a gear 6, operative through an aperture in the platform 1, that meshes with a rack 7 carried upon the base 7 of the turntable 8. By rotating the shaft 1 by means of a crank that may be applied to its end 5 the entire mechanism carried by turntable 8 may be moved longitudinally of the runway 2; said turntable 82 being mounted upon a trunnion 7 b of base 7 and secured in place by screw 7 Upon the turntable bearings 9 are provided in which a crank shaft 10 is carried and upon the angular portion of said crank shaft a saddle 11 is secured as shown in Figs. 3, a, 5 and 10, consisting of a block and cap, and said saddle carries the yoke 12 that carries the trip hammer 13. Pivotally secured to the yoke 12 by means of a shock absorbing structure is an upright formed with an angular base 15. The shock absorbing structure consists of a pivot 14- disposed between the base 15 and the yoke 12, and pin 16 provided with springs 16 and nuts 16 The upright 16% can rock upon pivot 14:, but is yieldingly held stationary with relation to yoke 12 by springs 16'" and bolts or pins 16 which are secured to yoke 12, when a blow is struck by hammer 13.

To the upper extremity of upright 14- a casting 17 is secured which is formed with a semi-circular slot 18 and within this slotted portion a shoe 20 is disposed upon a pin 21 that is carried by a crank arm 22 that, in turn, is carried by a drive shaft 23 journaled in bearings 2 1, 2 carried by the turn table 8. A pulley 25 also carried by the shaft 23 is driven by a belt 26 which conveys power from overhead shafting or oth-.

erwise. The said shaft 23 is further pro vided with a fly wheel 27. Rotation of the drive shaft 23 causes rotation of the crank arm and with it the shoe 20 which in turn will cause the structure composed of casting 17 upright 14:, yoke 12, hammer 13 and sad dle 11 to oscillate in a vertical plane upon the angular portion of the crank shaft 10 thereby causing the hammer to strike a blow or series of blows. During rotation of the crank arm 22 on the shaft 23 the shoe 20 will slide in the slot 18. The construction of said slot will tend to govern the length of stroke of the hammer. To one end of the crank 10 a lever 40 is secured by which said shaft may be moved through an arc of approximately 180 degrees thereby raising or lowering the hammer 13 and connections comprising the saddle 11, yoke 12, upright 14 and casting 17 formed with slot 18. Raising or lowering the slotted casting 17 with relation to the shaft 23 will cause the shoe 20 to travel in different portions of the slotted casting. The nearer the arc of travel of the shoe 20 in slot 18 approaches shaft 10, the greater the length of hammer stroke. The said lever 40 is adapted for engagement with a rack cut in the circumference of a segment 41 whereby the said shaft may be locked'in any adjustable position.

The reference numeral 28 designates a bearing secured to the turntable 8 and pivotally secured in the same is a yoke 29 for a' tension pulley 30 which may bear against the belt 26 to increase the friction between the same and the pulley 25. The pulley 3O is kept in inoperative position through the medium of a reach 31, slidably disposed between the plates of a guide 32 carried by the turntable, which connects the yoke 29 with a yoke 33 which is slidable upon abeam 34 carried by angle irons 35, 35 secured to the platform 1. A spring 36 disposed upon the reach 31 between the guide 32 and a block 37 tends to force the tension pulley away from the belt 16; when it is desired to increase thefriction between the belt 26 and pulley 25 a weight 38 removably secured to a rod 39 that is releasably secured to the beam 34 is moved away from said beam along said rod 39 toward its free end thereby overcoming the tension of the spring 36 and drawing the pulley 30 against the belt 26.

The reference numeral 42 designates a screw shaft, mounted in bearings 43, 43, and

made fast to said shaft is a nut 44 which is connected to the upper section 8 of the turntable as best shown in Figs. 6 and 8. Rotation of the shaft 42 which is held against longitudinal movement by collars 43 will cause nut 44 to travel along the shaft 42, the direction of travel depending upon direction of rotation, and as nut 44 is secured to turntable 8 while bearings 43 are secured to base 7 as shown in Fig. 8 this will cause turntable 8 to rotate on trunnion 7 and carry with it all the mechanism disposed upon it through an are limited by the length of the screw shaft 42. This movement may be nec essary when it is desired to examine the work under operation or for other reasons.

In operation the base of the device is secured to a suitable table or support and the work brought into operative position with relation to the hammer. The hammer may nowbe moved laterally on the runway 2 and enlarged field of operation.

also swung horizontally through an arc limited by the turntable 8 thereby aifording an The hammer may also be raised or lowered and the length of stroke varied thereby accommodating it to work of various kinds.

I/Vhat is claimed is 1. In a power hammer, a base, a turntable,

a reciprocating hammer mounted upon'said 2. In a power hammer, a base, a turntable,

a crank-shaft journaled in suitable bearings upon said turntable, a saddle for the angular portion of said crankshaft, a hammer yoked to said saddle, an upright secured to the yoke of said hammer, a casting secured to said upright and formed with a semi-circular slot, a drive shaft, a crank arm terminally carried by said drive shaft, a shafted shoe carried by said crank arm and projected into the slotted portion of said casting whereby rotar'y movement of the said drive shaft is transmitted tosaid yokedhammer in the form of reciprocating movement, a serrated segment secured to said turntable and means operatively associated with one end of said crank-shaft for releasable looking engagement withsaid serrated segment whereby said shaft may be adjusted and locked in such position.

In testimony that I claim the foregoing as. my own I have hereto afliXed my signature in the presence of two subscribing witnesses.

ERNST NYSTROM.

Witnesses:

G. L. LoFs'rRoM, ERIK NYSTROM.

Copies of this patent may be obtained for five cents eachfloy addressing the Commissioner of lfatents,

Washington. D. C. 

